I wanted to check in on you to see how everything was going are you still getting reactions when you have creatine? Did you find an alternative?
Wanted to add a MedHelp link, too, but this one doesn't specifically mention "upper lip" . .it states "face....", but may be helpful for you too ...
http://www.medhelp.org/drugs/creatine/show/4868?drug_section=side_effects
C~
Drugs.com states, cases of anaphylaxis have been reported while using creatine. During anaphylaxis your face, lips, mouth and tongue may swell within seconds or a few minutes of using the supplement. You may want to steer clear from this if you are noticing this symptom. Keep us posted.